Formation collapse sensor and related methods
a sensor and collapse technology, applied in seismology for waterlogging, borehole/well accessories, construction, etc., can solve problems such as many operations being affected
Active Publication Date: 2016-04-21
BAKER HUGHES INC
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- Description
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- Application Information
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Benefits of technology
The present disclosure provides an apparatus and method for sensing a downhole condition in a wellbore intersecting a formation. The apparatus includes a carrier and a transducer positioned at an end of the carrier, which generates a signal representative of reflected mechanical waves caused by a load applied by the formation to the carrier. This technology allows for accurate detection of the location of the load, making it useful in various wellbore construction and monitoring operations.
Problems solved by technology
Many operations may be affected by changes in downhole conditions, such as formation collapse.
Method used
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Embodiment Construction
[0017]The present disclosure relates to an apparatus and methods for detecting undesirable downhole conditions. Undesirable downhole conditions include, but are not limited to, well erosion, well collapse, well washout, tool decentralization, wellbore shift, tool slip, etc. When detected early enough, further problems such as damage to wellbore equipment can be alleviated. In addition, other mitigatory measures can be taken as a subsequent well treatment and well design.
[0018]In embodiments, the formation collapse sensor detects these well conditions by using mechanical waves conveyed by a carrier disposed along one or more sections of a wellbore. A transducer detects mechanical waves that may be reflected from a location along the carrier. These reflected waves may indicate the presence of an undesirable well condition such as formation collapse. Illustrative formation collapse sensors are described below.
[0019]FIG. 1 shows a well 30 that uses a formation collapse sensor 40 to dete...
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A sensor for detecting well conditions includes at least one transducer positioned at an end of the carrier. The carrier is positioned adjacent to and exposed to a wellbore wall and the transducer is configured to generate mechanical waves in the carrier. The carrier conveys the mechanical waves and has one or more sections initially free of a physical deformation that causes reflection of the mechanical waves. The sections physically deform to cause reflected mechanical waves when subjected to a loading from the formation. The transducer generates a signal representative of reflected mechanical waves received at the end of the carrier. The location of the loading is estimated using the received signal. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the general subject matter of the technical disclosure.
Description
BACKGROUND OF THE DISCLOSURE[0001]1. Field of the Disclosure[0002]This disclosure relates generally to oilfield downhole tools and more particularly to methods and devices for sensing a downhole condition in a wellbore intersecting a formation.[0003]2. Description of the Related Art[0004]Wellbore operations such as drilling, wireline logging, completions, perforations and interventions are performed to produce oil and gas from underground reservoirs. These operations are done in a wellbore that can extend thousands of feet underground. Many operations may be affected by changes in downhole conditions, such as formation collapse. In some aspects, the present disclosure is directed to methods and devices for detecting and locating such undesirable downhole conditions.SUMMARY OF THE DISCLOSURE[0005]In one aspect, the present disclosure provides an apparatus for sensing a downhole condition in a wellbore intersecting a formation. The apparatus may include a carrier positioned adjacent t...
Claims
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IPC IPC(8): G01V1/52E21B49/00G01V1/44
CPCG01V1/52E21B49/00G01V1/44E21B47/095
Inventor WELCH, JOHN C.WANG, KEPRIETO, CARLOS A.XU, ZHIYUE
Owner BAKER HUGHES INC